new rendering engine

crates/domain/tests/layout_tests.rs

@@ -1,6 +1,6 @@
 use domain::{
-    ContainerNode, Direction, Layout, LayoutChild, LayoutNode, LayoutValidationError, Sizing,
-    WidgetId,
+    AlignItems, ContainerNode, Direction, JustifyContent, Layout, LayoutChild, LayoutNode,
+    LayoutValidationError, Sizing, WidgetId,
 };
 use std::collections::BTreeSet;
 
@@ -16,6 +16,8 @@ fn row(children: Vec<LayoutChild>) -> LayoutNode {
         direction: Direction::Row,
         gap: 0,
         padding: 0,
+        justify_content: JustifyContent::Start,
+        align_items: AlignItems::Stretch,
         children,
     })
 }